Exposure apparatus

Abstract

In an exposure apparatus, n (n: integer, n≧2) rows of line-shaped light sources including light emitting elements are arranged in a movement direction of a photosensitive material. When a distance between the centers of recorded pixels is P, if the order of light emission by the light sources is in the movement direction of the photosensitive material, a distance L i between the centers of adjacent light sources satisfies the following equation: L 1 ={k i +(½)·(t i +t i+1 )/T}·P (i: integer, 1≦i≦n−1, k i : integer, k i ≧1, t i : exposure time of a light source in an i-th row, and T: Σt i+1 ). If the order of light emission is in a direction opposite to the movement direction, a distance L 1 satisfies the following equation: L 1 ={k i −(½)·(t i +t i+1 )/T}·P.

1 . An exposure apparatus for recording an image on a photosensitive recording material by exposing the photosensitive recording material to light emitted from a plurality of light emitting elements, the apparatus comprising: 
 n (n is an integer greater than or equal to 2) rows of line-shaped light sources which are arranged in a movement direction of the photosensitive recording material, and in each of which the plurality of light emitting elements is arranged in a direction substantially perpendicular to the movement direction of the photosensitive recording material, wherein when a distance between the centers of pixels recorded on the photosensitive recording material by sequential emission of light from the line-shaped light sources is P, if the order of light emission by the line-shaped light sources is in the same direction as the movement direction of the photosensitive recording material, a distance L 1  between the centers of line-shaped light sources adjacent to each other satisfies the following equation:        L   1   ={k   i +(½)·( t   i   +t   i+1 )/ T}·P      (where i is an integer satisfying 1≦i≦n−1, k i  is an integer greater than or equal to 1, t i  is exposure time of a line-shaped light source in an i-th row, and T is Σt i+1 ), and wherein if the order of light emission by the line-shaped light sources is in a direction opposite to the movement direction of the photosensitive recording material, a distance L 1  between the centers of line-shaped light sources adjacent to each other satisfies the following equation:        L   1   ={k   i −(½)·( t   i   +t   i+1 )/ T}·P.      
     
     
         2 . An exposure apparatus for recording an image on a photosensitive recording material by exposing the photosensitive recording material to light emitted from a plurality of light emitting elements, the apparatus comprising: 
 three rows of line-shaped light sources which are arranged in a movement direction of the photosensitive recording material, and in each of which the plurality of light emitting elements is arranged in a direction substantially perpendicular to the movement direction of the photosensitive recording material, wherein exposure time of a line-shaped light source at the center of the line-shaped light sources is q times (q is a positive number) longer than that of each of the other line-shaped light sources, and wherein when a distance between the centers of pixels recorded on the photosensitive recording material by sequential emission of light from the line-shaped light sources is P, if the order of light emission by the line-shaped light sources is in the same direction as the movement direction of the photosensitive recording material, a distance L between the centers of line-shaped light sources adjacent to each other satisfies the following equation:        L={k +(½)·( q+ 1)/( q+ 2)}· P      (where k is an integer greater than or equal to 1), and wherein if the order of light emission by the line-shaped light sources is in a direction opposite to the movement direction of the photosensitive recording material, a distance L between the centers of the line-shaped light sources adjacent to each other satisfies the following equation:        L={k− (½)·( q+ 1)/( q+ 2)}· P.      
     
     
         3 . An exposure apparatus as defined in  claim 1 , wherein at least one of the plurality of line-shaped light sources emits light which has a different hue from the other line-shaped light sources.  
     
     
         4 . An exposure apparatus as defined in  claim 1 , wherein each of the plurality of line-shaped light sources emits light which has a different hue from each other.  
     
     
         5 . An exposure apparatus as defined in  claim 2 , wherein at least one of the plurality of line-shaped light sources emits light which has a different hue from the other line-shaped light sources.  
     
     
         6 . An exposure apparatus as defined in  claim 2 , wherein each of the plurality of line-shaped light sources emits light which has a different hue from each other.